Abstract
A grazing/feedlot field study was conducted to evaluate the steroid hormone profile and brain monoamine oxidase type A (MAOA) activity of steers exhibiting characteristics attributed to the Buller Steer Syndrome in a feedlot environment. Differences of serum progesterone, testosterone, and estrogen were found in bullers at different phases of production. Brain MAO-A activity was greater in bullers than in non-bulling steers. This study suggests that MAO-A activity, under potential influence of steroidal hormones in the steer brain, may be a plausible mechanism that induces Buller Steer Syndrome.
Keywords: Cattlemen's Day, 2004, Kansas Agricultural Experiment Station contribution, no. 04-242-S, Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service), 923, Beef, Steroid, Brain monoamine oxidase type A (MAO-A) activity, Buller steers
How to Cite:
Epp, M., Blasi, D. A., Johnson, B., Kayser, J. & Grieger, D. M., (2004) “Steroid hormone profiles and brain monoamine oxidase type A (MAO-A) activity of buller steers”, Kansas Agricultural Experiment Station Research Reports 1(1), 80-83. doi: https://doi.org/10.4148/2378-5977.1632
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